How do you determine the correct ferrule size?

How do you determine the correct ferrule size?
How do you determine the correct ferrule size for the hose?

Measure the outside diameter of the hose with the hose barb inserted to determine the proper size hose ferrule to purchase. (See picture)

Example: We know the outside diameter with hose barb inserted is .664, so we need to purchase a ferrule that is larger. The proper size would be the FBL-675, which has an inside diameter of .675.

You should also measure the outside diameter of the hose barb to make sure it will fit in the hose ferrule you are ordering.

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